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Finding the Fourth Proportional to 256,879.50, 354,259.55 and 220,569.55

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Solution

The fourth proportional to 256,879.50, 354,259.55 and 220,569.55 is: 304,184.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,879.50 : 354,259.55 = 220,569.55 : x
  2. Step 2: Convert to fraction form
    256,879.50/354,259.55 = 220,569.55/x
  3. Step 3: Cross multiply
    256,879.50x = 354,259.55 × 220,569.55
  4. Step 4: Simplify right side
    256,879.50x = 78,138,869,526.70
  5. Step 5: Solve for x
    x = 78,138,869,526.70/256,879.50
  6. Step 6: Final answer
    x = 304,184.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.